636 ALLIS. [VOL xi. 
maxillary, instead of turning backward into the maxilla ; and his 
ramus palatinus trigemini (No. 97, p. 400) is either what I have 
considered as the main terminal portion of the maxillaris superior 
trigemini, or that nerve plus the palatinus posterior facialis. 
The name and distribution given by Pollard seem to indicate 
that it is the two nerves fused, but as he does not describe the 
branches of the nervus facialis one cannot be sure. In the fishes 
described by Pollard the anterior end of the palato-quadrate is 
found as a distinct and separate piece, which is called by him the 
prepalatine, and is said to be the homologue of the autopalatine 
of van Wijhe in Polypterus (No. 97, p. 403). The autopalatine 
is found in Amia also (AUP, Fig. 2, Pl. XX), and the ramus pal- 
atinus posterior facialis runs under it, as Pollard says his pala- 
tinus trigemini does in Misgurnus. This nerve in Misgurnus 
is thus certainly the r. palatinus posterior facialis of Amia. As 
this nerve and the r. maxillaris superior trigemini, in Amia, are 
both sensory nerves distributed to the same or to adjoining 
regions, and as they partially anastomose in Amia at the prox- 
imal end of the maxillary bone, there seems no reason why 
they might not fuse entirely if the bone or cartilage that nor- 
mally separates them should disappear, or become reduced and 
displaced, as it has in siluroids. That the palatinus of Mis- 
gurnus, lying below the palato-quadrate cartilage should be 
the homologue of a nerve lying above that cartilage seems 
wholly inadmissible. 
In addition to the terminal buds described above there are, 
in 10 mm. larvae, indications of the beginning of similar organs 
above organ 16 infraorbital and on the side of the cheek above 
the horizontal line of pit organs (No. 3, Fig. 4). InatIi mm. 
larva (No. 3, Fig. 6) the organs on the cheek have increased, 
and those above the horizontal pit line are seen to be arranged 
in horizontal lines. Buds have also appeared on the mandible 
on both sides of the mandibular canal line, and a spot on the 
operculum at its upper anterior end indicates the beginning of 
similar organs there. In 14 mm. specimens (No. 3, Fig. 8) 
the buds have increased in number, those on the cheek below 
the horizontal pit line being arranged in lines that run back- 
ward, or downward, or downward and forward. In 18 mm. 
